The phrase refers to the lyrics of a popular song that celebrates a vision of beauty and purity, often associated with weddings or romantic ideals. As an example, one might search the internet using those words to find the complete text of the song for singing or studying.
The enduring appeal of the song lies in its potent imagery and its evocation of profound emotional responses. Historically, songs expressing similar themes have been prevalent in numerous cultures, reflecting a universal desire to capture moments of intense joy and devotion.